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DNA Structure and Replication

DNA Structure and Replication
DNA with a G-C content of 50% will melt at approximately

90 °C
60°C
100 °C
70 °C

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DNA Structure and Replication
Proteins which help to open the double helix for DNA synthesis are

ligase
DNA helicases
single stranded binding proteins
DNA topoisomerase

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DNA Structure and Replication
What is the only common methylation in the DNA of eukaryotes?

Adenosine in GpA dinucleotides
Cytosine in CpG dinucleotides
Guanosine in ApGpA trinucleotides
None of these

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DNA Structure and Replication
Reverse transcriptase produces

DNA from peptides
DNA from RNA
RNA from DNA
RNA from RNA

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DNA Structure and Replication
In the study of one experiment it was found that the value of Tm for DNA is = 40° C. If the cell has 20% GC at the above Tm, then what will be value of 'Tm' if the GC% increases to 60%?

Decreases
Remains same
Can not be compared
Increases

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DNA Structure and Replication
The accepted hypothesis for DNA replication is

dispersive theory
evolutionary theory
conservative theory
semi-conservative theory

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